2014 · Q53
A railroad curve is to be laid on a circle. What radius (approximate) should be used if the track is to change direction by 25° in a distance of 120 m?
Elementary MathematicsTrigonometry
- A300 m
- B280 m
- C275 m
- D264 m
Explanation
Arc = rθ: r = 120/(25π/180) ≈ 275 m.